In its statement announcing the offer ABInBev says a combination would "build the first truly global beer company," given both businesses complimentary markets.

And as part of its charm offensive, ABInBev has even created a bells-and-whistles website promoting the deal with the URL www.globalbrewer.com— subtlety is not in abundance here.
ABInBev

CEO Carlos Brito has recorded a video message answering questions like "Why do you want to combine with SAB?" and "Why is this good for consumers?"

Brito outlines pretty much what is already in the offer document — SABMiller and ABInBev have complementary geographic footprints, similar values, and could offer more beers across more areas.
ABInBev
But this isn't just a takeover to please ABInBev shareholders by bolting on more growth. Oh no. This is about creating a "Better World".
ABInBev